HLS is available in two different versions: HLS 2 which is fitted to the front axle and HLS 4 which can be attached to the front and rear axle and allows lifting the entire vehicle. The hydraulic cylinder unit is located on the coilover body between spring perch and spring. The advantage of a hydraulic system is that there is no compression (motion) of the extended cylinder unit (resulting in no unwanted additional suspension movement) while driving.